Improved metallic-bath furnace



, J. S. BROWN. METALLIC BATH PURNAGE.

No. 43,006. Patented June '7, 1862.

UNITED STATES PATENT OEEICE JAMES S. BROWN, OF'FAWTUOKET, RHODE ISLAND.

Specification forming part of Letters Patent No. 43,006, dated June?, 1864.

To all wht/m it may concern Be it known 'that I, JAMES S. BROWN, a resident of Pawtucket, in the county of Providence and State of Rhode Island, have invented an Improved Metallic-Bath Furnace; and I do hereby'dcclarethe sa me to be fully described in the following specication and represented in the accompanying drawings, of which- Figure l is a front elevation. Fig. 2 is a longitudinal section taken through its hathpots. Fig..3 is a transverse section of it, taken through its middle, while Fig. 4 is another transversel section, taken through one of its fire-places.

In such drawings, A B represent two tireplaccs or chambers for combustion of coal or fuel, each of them being provided with a grate., a, and an ashpit, b, which is disposed under- AVneath the grate and has two doors, c d, one

of which makes part of the hearth O and is horizontal, while the other is arranged in a vertical plane. Between the two tire-places -or chambers of combustion A B there is a chamber, D, for holding one or more metallic baths or pots, E E, which rest on a bridge or shelf, F. The said shelf or bridge constitutes the bottom of the chamber D, and has a duepassage, e, made through it or against its front edge, as seen in Fig. 3. The said passage' c leads from the chamber D into an escapefine, l, in which there are one or more dampers, ff, the said tine being made to lead to a chimney and to passdirectly underneath and against the said bridge. There is an airpassage, g, leads out of the front of the flue l under the bath-pot chamber D, such passage g heilig provided with a stopper, 71,. Further more, there are one or more sight-holes, t' fi, made through the masonry of the furnace and leading into the .chamber D, each of these holes being provided with a cover, lc, by which vit may be closed. The chambers of combustion A B and the bath-chamber D are covered by cap-plates l m n o p, three of which-viz., those marked m n o--s'urround and serve to support the two bath pots E E, as well. as t cover the chamber D and two-dues or passages, q q-,vw hich open communication between the chambers A and B and the chamber D.

. A hollow dome or arch, F, may be arranged over the bath-pots, and have a tine, G, leading out of its top and downward to the external atmosphere, or a flue leading intothesamo. The'said dome F and its flue Goperate to collect and carry off the deleterious vapor'sa'nd gases which may escape from the/fire places and the baths.

The furnace, as described, is intended to have its pots supplied with lead 'or other metal or composition of metals easily fusible, the same, when in a molten state, answering the purpose of a bath for heating files in the process or processes of their manufacture, the bath producing an equality of temperature throughout each file when'submitted to it.

lt has been found in practice that the bath-` pots cannot be heated to advantage when im# mersed in the fuel or placed directlyv on or over it, and therefore l employ a separate chamber, D, combined with one'or more chambers of combustion, and having a bridge or shelf, (for supporting thepots,) and also atluepassa ge alongside of andA going underneath and against the under surface ofthe said bridge. By having the flue-passage go underneath the bridge, in manner as explained, the bottom of each of the pots', as well -asthe side-s of such pot, willbe subjected-to heat, as the bridge will become heated and the heat thereof will be conducted in'to the bottom of the pot.

I claimlhe improved metallic-bath furnace or combination and arrangement of one or more fireplaces, A B, a bath-pot chamber, D, a bridge, F, a flue-passage, c, and an escape-flue, I, the whole being connected in manner and so as to operate substantially as specified.

JAMES S. BROWN. Witnesses:

J AMES BROWN, Cans. A. WARLAND. 

